I have a test Leopard print server up and running. Im trying to share
out a USB Epson printer via IPP/mDNS and also Im trying to “push” out
the printer via Open Directory to a groups of test computers on my LAN
(also running Leopard). I have some observations:
1. I have noticed that Leopards print dialog box doesn’t show Bonjour
printers dynamically in the “Print” box. You can see your current
printers and of course you can add a printer (assuming you are an
administrator), but you no longer can see/add Bonjour printers from the
Print dialog box.
Yeah, that's moved to the printer browser, which you bring up by
selecting "Add Printer...". When you select a CUPS or Bonjour shared
printer, the client uses the driver (PPD file) from the server.
2. I have noticed that on some of my Leopard test clients that once I
have manually added the printer queue from my Leopard print server (via
IPP/Bonjour) to my test client, the Print and Fax Sys Pref Pane doesn’t
think I have added the printer yet, but the CUPS admin page thinks that
I have (and the “Print Test Page” from CUPS works too), and the actual
Print dialog box in TExtEdit.app for example also see the print queue
too, but when I go back to the Print & Fax Sys Pref Pane, the new print
queue isn't there. If I look in ~/Library/Printers/, I see the <print
queue>.app as expected. Obviously there is a bug in the Print & Fax
System Pref Pane?
No, CUPS shared printers are hidden unless you add them explicitly.
This is managed on a per-user basis...
(The PMPrinterIsFavorite and PMPrinterSetAsFavorite functions
manage the per-user favorites list, which controls what appears in
the print dialog.)
3. I have the Leopard test print server running on the same server as my
test OD master server. The only 2 services I have on are print and OD.
When I try and create a computer group in OD and add the print queue to
the computer group, OD acts like it doesn’t see the queue, even though
the USB printer is physically attached to the same computer. Any reason
why OD wont let me publish the print queue on the same system that the
print server is on?
Have you turned printer sharing on, and is the printer shared?
If so, this is probably a bug - please report it!
4. Can someone explain why uses must be administrators to add printers
in Leopard?
This change was for improving security - CUPS runs third-party
software (drivers) that is listed in the printer's PPD file, so we
don't want to allow ordinary users to add printers. This isn't an
issue for the typical home install (first/only user is admin), but
for more security conscious installs the printing system automatically
adjusts, requiring admin authentication if you aren't already admin
or if you have checked the "Require password to unlock each System
Preference pane" box in the Security preferences.
(The primary concern is just that unauthorized users could gain
access to jobs printed by others through a program listed as a
CUPS filter, and those jobs may contain sensitive information...)
Are there any ways to bypass this, or at least let users add
printers but not have full local admin rights to the computer?
CUPS 1.3.x (which is what comes with Leopard) includes much greater
control over the policies/access controls provided by the print
system. See:
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______________________________________________________________________
Michael R Sweet Senior Printing System Engineer
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